46 ©. H. Hitcheock—Labradorite Rocks in New Hampshire. 
Mica is abundant, and some specimens show hornblende in its 
pla e rock has a syenitic aspect, and it also contains the 7 
same geodes as the rocks below, with actinolite, amethyst and | 
the lowest stratigraphically. With our present knowledge, noth- 
through Massachusetts, sometimes fifteen miles wide. To the — 
north of Norway Brook no very satisfactory explorations have — 
been made. e specimens obtained were of nodular gneiss — 
To the north-east and east, the information is much more satis: 
factory. The whole of Passaconaway seems to be syenite — 
"np facts are thus stated by J. H. Huntington, Assistant — 
eologist : Me 
“On the east side of Tripyramid Mountain, and west of — 
Sabba Day Brook, a branch of Swift river, the labradorite is — 
so distinctive in its characteristics that it is easily recognized, — 
